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<title>Patch Task</title>
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<h2><a name="patch">Patch</a></h2>
<h3>Description</h3>
<p>Applies a diff file to originals. ; requires "patch" to be
 on the execution path.  </p>
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">patchfile</td> 
    <td valign="top">the file that includes the diff output</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">originalfile</td> 
    <td valign="top">the file to patch</td>
    <td align="center" valign="top">No, tries to guess it from the diff 
      file</td>
  </tr>
  <tr>
    <td valign="top">destfile</td> 
    <td valign="top">the file to send the output to instead of
      patching the file(s) in place.  <em>since Apache Ant 1.6</em></td>
    <td align="center" valign="top">No.</td>
  </tr>
  <tr>
    <td valign="top">backups</td> 
    <td valign="top">Keep backups of the unpatched files</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">quiet</td> 
    <td valign="top">Work silently unless an error occurs</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">reverse</td> 
    <td valign="top">Assume patch was created with old and new files 
      swapped.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">ignorewhitespace</td> 
    <td valign="top">Ignore whitespace differences.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">strip</td> 
    <td valign="top">Strip the smallest prefix containing <i>num</i> leading 
      slashes from filenames.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">dir</td> 
    <td valign="top">The directory in which to run the patch command.</td>
    <td align="center" valign="top">No, default is the project's basedir.</td>
  </tr>
  <tr>
    <td valign="top">failonerror</td>
    <td valign="top">Stop the buildprocess if the command exits with a
      return code signaling failure. Defaults to false.
      <em>since Ant 1.8.0</em></td>
    <td align="center" valign="top">No</td>
  </tr>
</table>
<h3>Examples</h3>
<pre>  &lt;patch patchfile=&quot;module.1.0-1.1.patch&quot;/&gt;</pre>
<p>applies the diff included in <i>module.1.0-1.1.patch</i> to the
files in base directory guessing the filename(s) from the diff output.</p>
<pre>  &lt;patch patchfile=&quot;module.1.0-1.1.patch&quot; strip=&quot;1&quot;/&gt;</pre>
<p>like above but one leading directory part will be removed. i.e. if
the diff output looked like</p>
<pre>
--- a/mod1.0/A	Mon Jun  5 17:28:41 2000
+++ a/mod1.1/A	Mon Jun  5 17:28:49 2000
</pre> 
the leading <i>a/</i> will be stripped.


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